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Dead fish removed from Brazil lagoon

16 March 2013 Last updated at 03:39 GMT

More than 65,000 tons of dead fish have been removed from a lagoon in Brazil.

The Rodrigo de Freitas Lagoon in the south of Rio de Janeiro is due to serve as a venue for rowing and canoeing events when the city hosts the Summer Olympics in 2016.

The city's environmental office blamed the deaths on a number of factors which led oxygen levels in the water to dramatically drop.

James Kelly reports.